JSON Schema Validator

The JSON Schema Validator checks any JSON document against a JSON Schema (Draft-7) using the battle-tested Ajv library. All validation runs client-side — your data never leaves the browser.

How to use

1. Paste or type your JSON Schema in the left panel
2. Paste or type the JSON data you want to validate in the right panel
3. Click Validate
4. Errors are displayed with instance paths and detailed messages

JSON Schema Draft-7 features

• type, properties, required, additionalProperties
• minimum, maximum, minLength, maxLength
• enum, const, format
• anyOf, oneOf, allOf, not
• $ref and definitions for reusable schemas

About Ajv

Ajv (Another JSON Validator) is the most downloaded JSON Schema validator for JavaScript with over 400 million npm downloads per month.